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Electro-Optical Effect Measurement of Thin-Film Material Using PM Fiber Mach-Zehnder Interferometer
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作者 屠晓光 赵雷 +4 位作者 陈平 陈少武 左玉华 余金中 王启明 《Journal of Semiconductors》 EI CAS CSCD 北大核心 2007年第7期1012-1016,共5页
A polarization-maintaining (PM) fiber Mach-Zehnder (MZ) interferometer has been established to measure the EO effect of very thin film materials with optical anisotropy. Unlike a common MZ interferometer, all the ... A polarization-maintaining (PM) fiber Mach-Zehnder (MZ) interferometer has been established to measure the EO effect of very thin film materials with optical anisotropy. Unlike a common MZ interferometer, all the components are connected via polarization-maintaining fibers. At the same time, a polarized DFB laser with a maximum power output of 10mW is adopted as the light source to induce a large extinction ratio. Here,we take it to determine the electro-optical coefficients of a very thin superlattice structure with GaAs, KTP, and GaN as comparative samples. The measured EO coefficients show good comparability with the others. 展开更多
关键词 electro-optic effect polarization-maintaining fiber mach-zehnder interferometer
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Time-Modulated Hamiltonian for Interpreting Delayed-Choice Experiments via Mach-Zehnder Interferometers 被引量:2
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作者 李志远 《Chinese Physics Letters》 SCIE CAS CSCD 2016年第8期10-14,共5页
Many delayed-choice experiments based on Mach-Zehnder interferometers (MZI) have been considered and made to address the fundamental problem of wave-particle duality. Conventional wisdom long holds that by inserting... Many delayed-choice experiments based on Mach-Zehnder interferometers (MZI) have been considered and made to address the fundamental problem of wave-particle duality. Conventional wisdom long holds that by inserting or removing the second beam splitter (BS2) in a controllable way, microscopic particles (photons, electrons, etc.) transporting within the MZI can lie in the quantum superposition of the wave and particle state as ψ= aw ψ wave + ap ψ particle. Here we present an alternative interpretation to these delayed-choice experiments. We notice that as the BS2 is purely classical, the inserting and removing operation of the BS2 imposes a time- modulated Hamiltonian H mod (t) = a(t)Hin + b(t)Hout, instead of a quantum superposition of H in and Hour as H = awHin + apHout, to act upon the incident wave function. Solution of this quantum scattering problem, rather than the long held quantum eigen-problem yields a synchronically time-modulated output wave function as ψ mod (t) = a(t) ψ wave +b(t) ψ particle, instead of the stationary quantum superposition state ψ = aw ψ wave + ap ψ particle. As a result, the probability of particle output from the MZI behaves as if they are in the superposition of the wave and particle state when many events over time accumulation are counted and averaged. We expect that these elementary but insightful analyses will shed a new light on exploring basic physics beyond the long-held wisdom of wave-particle duality and the principle of complementarity. 展开更多
关键词 of is mzi in Time-Modulated Hamiltonian for Interpreting Delayed-Choice Experiments via mach-zehnder interferometers for
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Simulation of distributed optical fiber disturbance detection system based on Sagnac/Mach-Zehnder interferometer and cross-correlation location 被引量:2
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作者 方捻 李杰 +2 位作者 王陆唐 黄肇明 杨烨 《Journal of Shanghai University(English Edition)》 CAS 2011年第2期115-118,共4页
A distributed optical fiber disturbance detection system consisted of a Sagnac interferometer and a Mach-Zehnder interferometer is demonstrated. Two interferometers outputs are connected to an electric band-pass filte... A distributed optical fiber disturbance detection system consisted of a Sagnac interferometer and a Mach-Zehnder interferometer is demonstrated. Two interferometers outputs are connected to an electric band-pass filter via a detector respectively. The central frequencies of the two filters are selected adaptively according to the disturbance frequency. The disturbance frequency is obtained by either frequency spectrum of the two interferometers outputs. An alarm is given out only when the Sagnac interferometer output is changed. A disturbance position is determined by calculating a time difference with a cross-correlation method between the filter output connected to the Sagnac interferometer and derivative of the filter output connected to the Mach-Zehnder interferometer. The frequency spectrum, derivative and cross-correlation are obtained by a signal processing system. Theory analysis and simulation results are presented. They show that the system structure and location method are effective, accurate, and immune to environmental variations. 展开更多
关键词 Sagnac interferometer mach-zehnder interferometer distributed optical fiber disturbance detection system cross-correlation LOCATION
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In-Fiber Mach-Zehnder Interferometer Based on Waist-Enlarged Taper and Core-Mismatching for Strain Sensing 被引量:1
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作者 张芸山 乔学光 +1 位作者 邵敏 刘钦朋 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第6期84-88,共5页
An in-fiber Mach-Zehnder interferometer for strain measurement is proposed and experimentally demonstrated. The sensor consists of a taper followed by a short section of a multi-mode fiber (MMF) and a dispersion com... An in-fiber Mach-Zehnder interferometer for strain measurement is proposed and experimentally demonstrated. The sensor consists of a taper followed by a short section of a multi-mode fiber (MMF) and a dispersion com- pensating fiber (DCF), which is sandwiched between two single mode fibers (SMFs). The taper is used as a fiber coupler to excite cladding modes in the SMF, and these cladding modes transmit within the MMF and the DCF. The core mode and the cladding modes interfere in the DCF SMF fusion point to form intermodal interference. A well-defined interference spectrum is obtained in the experiment. Selected interference dips are used to measure the strain changes. The experimental results show that this device is sensitive to strain with the wavelength-referenced sensitivity of 2.6 pm/με and the power-referenced sensitivity of 0. 0027 dB/με, respectively. 展开更多
关键词 In-Fiber mach-zehnder interferometer Based on Waist-Enlarged Taper and Core-Mismatching for Strain Sensing DCF mzi MMF
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Quantitative Visualization of the Thermal Boundary Layer of Forced Convection on a Heated or Cooled Flat Plate with a 30°Leading Edge Using a Mach-Zehnder Interferometer 被引量:1
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作者 Jun Liu Atsuki Komiya 《Journal of Flow Control, Measurement & Visualization》 CAS 2022年第4期99-116,共18页
This study focuses on the experimental measurements of the heat transfer coefficient over a flat plate with a 30° leading edge. Under forced convection by a hot/cold air and flow over a cooled/heated flat plate, ... This study focuses on the experimental measurements of the heat transfer coefficient over a flat plate with a 30° leading edge. Under forced convection by a hot/cold air and flow over a cooled/heated flat plate, the thermal boundary layer and its thickness are quantitatively visualized and measured using a Mach-Zehnder interferometer. In addition, the variation in the local heat transfer coefficient is evaluated experimentally with respect to the air flow velocity and temperature. Differences within the heat transfer performance between the plates are confirmed and discussed. As a result, the average heat transfer performance is about the same for the heated plate and the cooled plate under all air velocity conditions. This contrasts with the theoretical prediction in the case of low air velocity, the reason considered was that the buoyancy at the 30° leading edge blocked air from flowing across the surface of the plate. 展开更多
关键词 Thermal Boundary Layer Forced Convection Heat Transfer Coefficient VISUALIZATION mach-zehnder interferometer
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Temperature-induced effect on refractive index of graphene based on coated in-fiber Mach-Zehnder interferometer 被引量:1
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作者 李丽君 宫顺顺 +5 位作者 刘仪琳 徐琳 李文宪 马茜 丁小哲 郭晓丽 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第11期414-419,共6页
The temperature-induced complex refractive index(CRI) effect of graphene is demonstrated theoretically and experimentally based on a graphene coated in-fiber MZI(Mach-Zehnder interferometer). The relationships bet... The temperature-induced complex refractive index(CRI) effect of graphene is demonstrated theoretically and experimentally based on a graphene coated in-fiber MZI(Mach-Zehnder interferometer). The relationships between real and imaginary parts of the graphene CRI and temperature are obtained through investigating the dip wavelength and intensity of the MZI interference spectrum changing with temperature, respectively. The temperature effect of CRI of the graphene is also analyzed theoretically. Both experimental and theoretical studies show that the real part and imaginary part of the CRI nonlinearly decrease and increase with temperature increasing, respectively. This graphene-coated in-fiber MZI structure also possesses the advantages of easy fabrication, miniaturization, low cost and robustness. It has potential applications in nanomaterial-based optic devices for communication and sensing. 展开更多
关键词 in-fiber mach-zehnder interferometer graphene temperature-induced complex refractive index
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Dispersion suppression scheme for Mach-Zehnder interferometer based interleaver using phase shifter
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作者 邹喜华 Pan Wei Luo Bin Qin Zhangmiao Zhang Weili Wang Mengyao 《High Technology Letters》 EI CAS 2006年第1期10-13,共4页
To suppress the dispersion effect, an improved scheme was proposed for Mach-Zehnder intefferometer (MZI) based interleaver. The device consists of an MZI, a fiber loop (FL), and a phase shifter inserted in FL. The... To suppress the dispersion effect, an improved scheme was proposed for Mach-Zehnder intefferometer (MZI) based interleaver. The device consists of an MZI, a fiber loop (FL), and a phase shifter inserted in FL. The introduction of π phase shifter into FI, dramatically suppresses the dispersion effiect. Then the transmission response remains square-like shape, with low frequency deviation and high extinction ratio. Moreover, the lower frequency deviation is achieved by reducing the dispersion coefficient. For 100GHz-spacing interleaver, the 0.08nm deviation is reduced to 0.02nm by replacing G.652 with G.655. 展开更多
关键词 INTERLEAVER mach-zehnder interferometer mzi dispersion effect phase shifter
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Compact temperature-insensitive modulator based on a silicon microring assistant Mach-Zehnder interferometer
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作者 张雪键 冯雪 +1 位作者 张登科 黄翊东 《Chinese Physics B》 SCIE EI CAS CSCD 2012年第12期250-257,共8页
On the silicon-on-insulator platform, an ultra compact temperature-insensitive modulator based on a cascaded microring assistant Mach-Zehnder interferometer is proposed and demonstrated with numerical simulation. Acco... On the silicon-on-insulator platform, an ultra compact temperature-insensitive modulator based on a cascaded microring assistant Mach-Zehnder interferometer is proposed and demonstrated with numerical simulation. According to the calculated results, the tolerated variation of ambient temperature can be as high as 134 ℃ while the footprint of such a silicon modulator is only 340 μm2. 展开更多
关键词 integrated modulator temperature sensitivity MICRORING mach-zehnder interferometer
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An Improved Experiment to Determine the‘Past of a Particle’in the Nested Mach-Zehnder Interferometer
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作者 A.Ben-Israel L.Knips +4 位作者 J.Dziewior J.Meinecke A.Danan H.Weinfurter L.Vaidman 《Chinese Physics Letters》 SCIE CAS CSCD 2017年第2期4-6,共3页
We argue that the modification proposed by Li et al. [Chin. Phys. Lett. 32 (2015)050303] to the experiment of Danan et al. [Phys. Rev. Lett. 111 (2013) 240402] does not test the past of the photon as characterized... We argue that the modification proposed by Li et al. [Chin. Phys. Lett. 32 (2015)050303] to the experiment of Danan et al. [Phys. Rev. Lett. 111 (2013) 240402] does not test the past of the photon as characterized by local weak traces. Instead of answering the questions: (i) were the photons in A? (ii) were the photons in B? and (iii) were the photons in C? the proposed experiment measures a degenerate operator answering the questions: (i) were the photons in A? and (ii) were the photons in B and C together? A negative answer to the last question does not tell us if photons were present in B or C. On the other hand, a simple variation of the proposal by Li et al. does provide conceptually better evidence for the past of the pre- and post-selected photon, but this evidence will be in agreement with the results of Danan et al. 展开更多
关键词 LI In in the Nested mach-zehnder interferometer An Improved Experiment to Determine the
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Theoretical Analysis and Experiment of Temperature Stability for Fiber-optic Mach-Zehnder Interferometer Filter
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作者 LU Ping, LIU De ming, HUANG De xiu, SUN Jun qiang (Dept. of Optoelectrn. Eng., Huazhong University of Science and Technology, Wuhan 430074, CHN) 《Semiconductor Photonics and Technology》 CAS 2002年第3期150-152,共3页
Fiber optic Mach Zehnder interferometer(MZI) can be used as wavelength multiplexers and demultiplexers. The △ L and △ directly influence the properties of MZI. To lengthen the △ L can demultiplex much more wavelen... Fiber optic Mach Zehnder interferometer(MZI) can be used as wavelength multiplexers and demultiplexers. The △ L and △ directly influence the properties of MZI. To lengthen the △ L can demultiplex much more wavelengths, but when the △ L is longer, the temperature will influence MZI more seriously. A method to solve this problem is proposed, which enables MZI to work stably. The wavelength distance is 0.8 nm, and the extinction ratio is high. 展开更多
关键词 mach-zehnder interferometer COUPLER Wavelength MULTIPLEXERS and DEMULTIPLEXERS
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Two-Photon Interference Constructed by Two Hong–Ou–Mandel Effects in One Mach-Zehnder Interferometer
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作者 Rui Liu Ling-dun Kong +5 位作者 Zhon-Xiang Wang Yu Si Wen-Rong Qi Shuang-Yin Huang Chenghou Tu Yongnan Hui-Tian Wang 《Chinese Physics Letters》 SCIE CAS CSCD 2018年第9期14-18,共5页
We present a two-photon interference experiment in a modified Mach-Zehnder (MZ) interferometer in which two Hong-Ou-Mandel effects occur in tandem and construct superposed two-photon states. The signal photons pass ... We present a two-photon interference experiment in a modified Mach-Zehnder (MZ) interferometer in which two Hong-Ou-Mandel effects occur in tandem and construct superposed two-photon states. The signal photons pass both the arms of the MZ interferometer while the idler photons pass one arm only. Interestingly, the probability of the idler photons emerging from any output port still shows a sine oscillation with the two-photon phase difference and it can be characterized only by the indistinguishability of the two-photon amplitudes. We also observe a two-photon interference pattern with a period being equal to the wavelength of the parametric photons instead of the two-photon photonie de Broglie wavelength due to the presence of two-photon phase difference, in particular, with complementary probabilities of finding the two-photon pairs in two output ports. The abundant observations can facilitate a more comprehensive understanding of the two-photon interference. 展开更多
关键词 Mandel Effects in One mach-zehnder interferometer OU Two-Photon Interference Constructed by Two Hong
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An Ideal Experiment to Determine the ’Past of a Particle’ in the Nested Mach-Zehnder Interferometer
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作者 李福 Hashmi F. A. +1 位作者 张俊香 朱诗尧 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第5期10-13,共4页
An ideal experiment is designed to determine the past of a particle in the nested Mach-Zehnder interferometer (MZI) by using standard quantum mechanics with quantum non-demolition measurements. We find that when the... An ideal experiment is designed to determine the past of a particle in the nested Mach-Zehnder interferometer (MZI) by using standard quantum mechanics with quantum non-demolition measurements. We find that when the photon reaches the detector, it only follows one arm of the outer interferometer and leaves no trace in the inner MZI. When it goes through the inner MZI, it cannot reach the detector. Our result obtained from the standard quantum mechanics contradicts the statement based on two-state vector formulism, 'the photon did not enter the (inner) interferometer, the photon never left the interferometer, but it was there'. Therefore, the statement and also the overlapping claim are incorrect. 展开更多
关键词 in the Nested mach-zehnder interferometer An Ideal Experiment to Determine the Past of a Particle
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MZI/FPI Fiber Optic Dual-parameter Sensor Based on a Double Cone and Air Cavity Structure(Invited)
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作者 YUAN Tingxuan ZHAO Lilong +5 位作者 REN Jianxin MAO Yaya ULLAH Rahat WU Xiangyu MAO Beibei XIA Wenchao 《光子学报》 EI CAS CSCD 北大核心 2024年第10期64-72,共9页
This paper proposes a Mach Zehnder/Fabry Perot Interferometer(MZI/FPI)fiber sensor based on Single-mode Fiber(SMF)and Hollow-core Fiber(HCF),which has high sensitivity to temperature and lateral loads.The proposed dev... This paper proposes a Mach Zehnder/Fabry Perot Interferometer(MZI/FPI)fiber sensor based on Single-mode Fiber(SMF)and Hollow-core Fiber(HCF),which has high sensitivity to temperature and lateral loads.The proposed device consists of two single-mode fiber cones formed by manually controlling the fusion splicer and an air cavity formed by fusing a section of hollow-core fiber.The structure of the sensor is a double cone cascaded air cavity.At the beginning of the design,we compared the basic transmission spectra of single cone structure and double cone structure experimentally,and therefore chose to use double cone structure and air cavity cascade.Light undergoes its first reflection at the first interface between the single-mode fiber and the air cavity structure,and its second reflection at the second interface between the air cavity structure and the single-mode fiber.The two reflected light waves produced by the two reflections form FP interference,which can be used to measure lateral loads.The transmitted light is excited through the first cone,and a portion of the core mode light is excited to the cladding,while another portion of the core mode light continues to propagate in the core.The light couples at the second cone,and the cladding mode light couples back into the core,forming MZ interference with the core mode light,which can be used to measure temperature.The use of hollow-core fiber to form an air cavity has little effect on transmitted light,while avoiding the problem of crosstalk in dual parameter measurements.By designing temperature and lateral load experiments,this article verifies the sensitivity characteristics of this sensor to temperature and lateral loads.A significant redshift phenomenon was observed in the temperature experiment.A significant redshift phenomenon also occurred in the lateral load experiment.Through wavelength demodulation,the experimental results show that the wavelength sensitivity of the sensor to temperature is 56.29 pm/℃in the range of 30℃to 80℃.The wavelength sensitivity of the sensor to lateral loads is 1.123 nm/N in the range of 0~5 N.In addition,we have prepared multiple sets of fiber optic sensors with this structure and conducted repeated experiments to verify that the sensing performance of this structure of fiber optic sensors for temperature and lateral load is relatively stable.Also,the different waist diameters of cones will have a certain impact on the transmission spectrum of MZ,while the length of the air cavity will also have a certain impact on the reflection spectrum of FP.This article lists some fiber optic sensors for dual parameter measurement of temperature and lateral load.Compared with the listed sensors,the fiber optic sensor proposed in this article has better sensitivity to temperature and lateral load.And the fiber optic sensor proposed in this article has a simple manufacturing process,low production cost,and good performance,which has certain prospects in scientific research and industrial production. 展开更多
关键词 Temperature Lateral load Fiber sensor mach-zehnder interferometer Fabry-Pérot interferometer
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基于光纤锥级联的Mach-Zehnder干涉湿度传感器 被引量:2
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作者 程君妮 《传感器与微系统》 CSCD 2019年第3期85-88,共4页
提出了一种基于光纤锥级联纤芯失配的Mach-Zehnder干涉湿度传感器。将两段色散补偿光纤对芯熔接光纤锥,并依次级联,再接入一段6 mm的多模渐变光纤,构成了Mach-Zehnder干涉仪,其中多模渐变光纤和芯径失配处的两个节点起到了光纤耦合器的... 提出了一种基于光纤锥级联纤芯失配的Mach-Zehnder干涉湿度传感器。将两段色散补偿光纤对芯熔接光纤锥,并依次级联,再接入一段6 mm的多模渐变光纤,构成了Mach-Zehnder干涉仪,其中多模渐变光纤和芯径失配处的两个节点起到了光纤耦合器的作用。环境湿度变化,引起传感器透射谱能量发生改变。实验结果表明:透射谱波峰能量和湿度有较好的线性关系。当湿度在35%~95%RH范围内变化,传感器灵敏度为-0. 074 9 d B/%RH,线性度R2为0. 995。设计的传感器结构紧凑、灵敏度高,可以广泛应用于不同领域的湿度测量。 展开更多
关键词 湿度传感器 色散补偿光纤 光纤锥 多模渐变光纤 mach-zehnder干涉仪
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臂长差啁啾型级联Mach-Zehnder干涉仪滤波性能
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作者 周志 潘炜 +1 位作者 罗斌 邹喜华 《西南交通大学学报》 EI CSCD 北大核心 2007年第5期615-619,共5页
为增大自由频谱区(FSR),优化级联Mach-Zehnder干涉仪(MZIs)的带通滤波性能,利用其与阶梯形滤波器原理的相似性,用啁啾型臂长差替代恒定臂长差.用传输矩阵法建立了臂长差啁啾型级联MZI的数学模型,分析3 dB带宽及FSR的变化规律,验证了理... 为增大自由频谱区(FSR),优化级联Mach-Zehnder干涉仪(MZIs)的带通滤波性能,利用其与阶梯形滤波器原理的相似性,用啁啾型臂长差替代恒定臂长差.用传输矩阵法建立了臂长差啁啾型级联MZI的数学模型,分析3 dB带宽及FSR的变化规律,验证了理论模型及分析方法的正确性.仿真结果表明,通过合理选取啁啾系数,臂长差啁啾型级联MZI同时获得了较大的FSR和较小的3 dB带宽,且最佳啁啾系数随衍射级数增大而增大. 展开更多
关键词 导波光学 光滤波器 级联mach-zehnder干涉仪(mzis) 臂长差啁啾 性能
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一种全光纤Mach-Zehnder干涉式温度传感器设计 被引量:4
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作者 宫顺顺 李丽君 +3 位作者 蒋露 张艳 李文宪 徐琳 《中国新通信》 2017年第2期26-28,共3页
本文提出了一种基于全光纤马赫-曾德尔(Mach-Zehnder)干涉式光纤温度传感器结构,是在单模光纤(SMF)上熔接一段30mm长的细芯径光纤,利用光纤的纤芯模和包层模对温度灵敏度的差异,来测量在不同波长处的波长温度关系,实现对温度的测量。实... 本文提出了一种基于全光纤马赫-曾德尔(Mach-Zehnder)干涉式光纤温度传感器结构,是在单模光纤(SMF)上熔接一段30mm长的细芯径光纤,利用光纤的纤芯模和包层模对温度灵敏度的差异,来测量在不同波长处的波长温度关系,实现对温度的测量。实验中我们分别对波长1531.2375nm和1544.39nm处的干涉波谷进行测量,得到两个波谷的温度灵敏度分别为89pm/℃和94.7pm/℃,该温度灵敏度系数远远大于光纤布拉格光栅,且测试曲线呈现很好的线性度。该类传感器具有结构简单、温度灵敏度高、造价低等优点。 展开更多
关键词 光纤传感器 马赫曾德尔干涉仪 温度
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熔融七芯光纤球对称的Mach-Zehnder干涉传感特性
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作者 李怀宝 李红 +2 位作者 宋言明 祝连庆 娄小平 《传感器与微系统》 CSCD 2019年第8期46-49,53,共5页
提出了一种基于七芯光纤和单模光纤熔球对称型Mach-Zehnder干涉传感器。单模光纤端面熔接制作直径180μm光纤球,将2个光纤球中间熔接一段七芯光纤,位于Mach-Zehnder干涉结构中间的七芯光纤长度为9 mm。传感器外界环境温度、曲率的改变... 提出了一种基于七芯光纤和单模光纤熔球对称型Mach-Zehnder干涉传感器。单模光纤端面熔接制作直径180μm光纤球,将2个光纤球中间熔接一段七芯光纤,位于Mach-Zehnder干涉结构中间的七芯光纤长度为9 mm。传感器外界环境温度、曲率的改变都会使传感器的纤芯基模和包层模的光程差发生改变,从而引起传感器干涉谱发生变化,通过监测干涉谱可以实现对外界物理量的测量。通过建立的有限差分光束传播法仿真分析结果可知:光纤球结构增加了七芯光纤的光耦合效率,七芯光纤结构的干涉效应得到了有效改善。实验结果表明:当温度在20~95℃范围内变化时,传感器的温度灵敏度为58. 97 pm/℃,线性度为0. 996 22;曲率在0~1 m-1变化范围内,传感器的曲率灵敏度为2. 55 nm/m-1,线性度为0. 996 73。设计的传感器结构紧凑、制作工艺简单、可靠性高。 展开更多
关键词 光纤传感器 马赫—曾德尔干涉仪 光纤球对称结构 七芯光纤 温度 曲率
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Characterize and optimize the four-wave mixing in dual-interferometer coupled silicon microrings 被引量:1
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作者 Chao Wu Yingwen Liu +7 位作者 Xiaowen Gu Shichuan Xue Xinxin Yu Yuechan Kong Xiaogang Qiang Junjie Wu Zhihong Zhu Ping Xu 《Chinese Physics B》 SCIE EI CAS CSCD 2019年第10期198-203,共6页
By designing and fabricating a series of dual-interferometer coupled silicon microrings, the coupling condition of the pump, signal, and idler beams can be engineered independently and then we carried out both the con... By designing and fabricating a series of dual-interferometer coupled silicon microrings, the coupling condition of the pump, signal, and idler beams can be engineered independently and then we carried out both the continuous-wave and pulse pumped four-wave mixing experiments to verify the dependence of conversion efficiency on the coupling conditions of the four interacting beams, respectively. Under the continuous-wave pump, the four-wave mixing efficiency gets maximized when both the pump and signal/idler beams are closely operated at the critical coupling point, while for the pulse pump case, the efficiency can be enhanced greatly when the pump and converted idler beams are all overcoupled. These experiment results agree well with our theoretical calculations. Our design provides a platform for explicitly characterizing the four-wave mixing under different pumping conditions, and offers a method to optimize the four-wave mixing, which will facilitate the development of on-chip all-optical signal processing with a higher efficiency or reduced pump power. 展开更多
关键词 SILICON resonators four-wave mixing mach-zehnder interferometer
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一种融合Φ-OTDR和MZI的PCCP断丝监测系统 被引量:2
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作者 熊菲 屈博扬 +8 位作者 周廣南 王浩然 张旭苹 梁蕾 王金 赵世松 张道 王峰 张益昕 《光电子技术》 CAS 2023年第2期133-141,共9页
设计了一种融合相位敏感型光时域反射计(Φ-OTDR)和马赫-曾德尔干涉仪(MZI)的预应力钢筋混凝土管(PCCP)断丝监测系统。通过引入优化的IQ解调算法,减少了40%以上的数据运算量。实验结果证明该系统的单端测量距离不低于20 km,频率响应不低... 设计了一种融合相位敏感型光时域反射计(Φ-OTDR)和马赫-曾德尔干涉仪(MZI)的预应力钢筋混凝土管(PCCP)断丝监测系统。通过引入优化的IQ解调算法,减少了40%以上的数据运算量。实验结果证明该系统的单端测量距离不低于20 km,频率响应不低于20 kHz,空间定位误差在±2 m以内,具备长距离定位断丝故障和分辨振动事件特征频率的能力,为PCCP的全生命周期在线结构健康监测提供了一种可靠的技术手段。 展开更多
关键词 预应力钢筋混凝土管(PCCP) 相位敏感型光时域反射计(Φ-OTDR) 马赫-曾德尔干涉仪(mzi) 断丝监测
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Complementarity via Minimum Error Measurement in a Two-Path Interferometer
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作者 Junzhao Liu Yanjun Liu Jing Lu 《Chinese Physics Letters》 SCIE CAS CSCD 2019年第5期12-16,共5页
We study the fringe visibility and the which-path information(WPI) of a general Mach-Zehnder interferometer with an asymmetric beam splitter(BS). A minimum error measurement in the detector is used to extract the WPI.... We study the fringe visibility and the which-path information(WPI) of a general Mach-Zehnder interferometer with an asymmetric beam splitter(BS). A minimum error measurement in the detector is used to extract the WPI. Both the fringe visibility V and the WPI I_(path) are affected by the initial state of the photon and the second asymmetric BS. The condition in which the WPI takes the maximum is obtained. The complementarity relationship V^2 + I_(path)~2 ≤ 1 is found, and the conditions for equality are also presented. 展开更多
关键词 WPI Complementarity VIA Minimum Error Measurement in a Two-Path interferometer mzi
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